IKONOS has 1-meter ground resolution for panchromatic band and 4-meter for
multi-spectral bands. Several scenes, covering parts of the coastal zone of the study area
(Figure 3-5), are acquired by the Centre for Remote Sensing (CRISP, 2005). The very
fine spatial resolution of IKONOS is useful for visual interpretation. IKONOS scenes are
also used as a reference to assess the accuracy assessment. Because IKONOS provides a
high resolution image, we used it to acquire ground control points instead of using a
ground survey.